date and time created 82/05/22 22:26:16 by sam

SCCS-vsn: sbin/routed/af.c 4.1

diff --git a/usr/src/sbin/routed/af.c b/usr/src/sbin/routed/af.c
new file mode 100644 (file)
index 0000000..e409215
--- /dev/null
+++ b/usr/src/sbin/routed/af.c
@@ -0,0 +1,139 @@
+#ifndef lint
+static char sccsid[] = "@(#)af.c       4.1 %G%";
+#endif
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <net/in.h>
+
+#include "router.h"
+#include "rip.h"
+
+/*
+ * Address family support routines
+ */
+int    null_hash(), null_netmatch(), null_output(),
+       null_portmatch(), null_checkhost(), null_canon();
+int    inet_hash(), inet_netmatch(), inet_output(),
+       inet_portmatch(), inet_checkhost(), inet_canon();
+#define NIL \
+       { null_hash,            null_netmatch,          null_output, \
+         null_portmatch,       null_checkhost,         null_canon }
+#define        INET \
+       { inet_hash,            inet_netmatch,          inet_output, \
+         inet_portmatch,       inet_checkhost,         inet_canon }
+
+struct afswitch afswitch[AF_MAX] =
+       { NIL, NIL, INET, INET, NIL, NIL, NIL, NIL, NIL, NIL, NIL };
+
+inet_hash(sin, hp)
+       register struct sockaddr_in *sin;
+       struct afhash *hp;
+{
+
+       hp->afh_nethash = sin->sin_addr.s_net;
+       hp->afh_hosthash = ntohl(sin->sin_addr.s_addr);
+}
+
+inet_netmatch(sin1, sin2)
+       struct sockaddr_in *sin1, *sin2;
+{
+
+       return (sin1->sin_addr.s_net == sin2->sin_addr.s_net);
+}
+
+/*
+ * Verify the message is from the right port.
+ */
+inet_portmatch(sin)
+       struct sockaddr_in *sin;
+{
+       int port = ntohs(sin->sin_port);
+
+       return (port == IPPORT_ROUTESERVER);
+}
+
+/*
+ * Internet output routine.
+ */
+inet_output(sin, size)
+       struct sockaddr_in *sin;
+       int size;
+{
+       extern int s;
+       extern char packet[MAXPACKETSIZE];
+       struct sockaddr_in dst;
+
+       dst = *sin;
+       sin = &dst;
+       if (sin->sin_port == 0)
+               sin->sin_port = htons(IPPORT_ROUTESERVER);
+       if (send(s, sin, packet, size) < 0)
+               perror("send");
+}
+
+/*
+ * Return 1 if the address is for an Internet host,
+ * otherwise assume it's a network address (broadcast).
+ */
+inet_checkhost(sin)
+       struct sockaddr_in *sin;
+{
+       extern struct in_addr if_makeaddr();
+       struct in_addr netaddr;
+
+       netaddr = if_makeaddr((int)sin->sin_addr.s_net, INADDR_ANY);
+       return (netaddr.s_addr != sin->sin_addr.s_addr);
+}
+
+inet_canon(sin)
+       struct sockaddr_in *sin;
+{
+       sin->sin_port = 0;
+}
+
+/*ARGSUSED*/
+null_hash(addr, hp)
+       struct sockaddr *addr;
+       struct afhash *hp;
+{
+
+       hp->afh_nethash = hp->afh_hosthash = 0;
+}
+
+/*ARGSUSED*/
+null_netmatch(a1, a2)
+       struct sockaddr *a1, *a2;
+{
+
+       return (0);
+}
+
+/*ARGSUSED*/
+null_output(a1, n)
+       struct sockaddr *a1;
+       int n;
+{
+       ;
+}
+
+/*ARGSUSED*/
+null_portmatch(a1)
+       struct sockaddr *a1;
+{
+       return (0);
+}
+
+/*ARGSUSED*/
+null_checkhost(a1)
+       struct sockaddr *a1;
+{
+       return (0);
+}
+
+/*ARGSUSED*/
+null_canon(a1)
+       struct sockaddr *a1;
+{
+       ;
+}